auth, rec: no ECDSA with OpenSSL 3.3

[Habbie]

• Program: Authoritative, Recursor
• Issue type: Bug report

Short description

In OpenSSL 3.3 (at least as packaged in Alpine Edge and Debian Experimental), pkg-config libcrypto --variable=prefix returns nothing instead of /usr. This causes us to fail to find ecdsa.h

Environment

• Operating system: Alpine Edge, Debian Experimental (both as of today0
• Software version: auth 4.9, rec 5, probably others
• Software source: tarballs

Steps to reproduce

1. build as usual

Expected behaviour

Working ECDSA, passing tests.

Actual behaviour

checking for /include/openssl/ecdsa.h... no

and the generic signers test fails. Note the path, it's missing /usr at the beginning.

Other information

--with-libcrypto=/usr works around the issue

[rgacogne]

Might be related to https://github.com/openssl/openssl/issues/23569

[rgacogne]

There was a big refactoring in https://github.com/openssl/openssl/commit/2ac569a67b9d0980efa2d8061a6a61e0645f37a7, clearly. I'm not going to dive into that for now.

[Habbie]

workaround for Alpine: https://gitlab.alpinelinux.org/alpine/aports/-/merge_requests/64646